Effect of trophic conditions on microalga growth, nutrient removal, algal organic matter, and energy storage products in Scenedesmus (Acutodesmus) obliquus KGE-17 cultivation

Title
Effect of trophic conditions on microalga growth, nutrient removal, algal organic matter, and energy storage products in Scenedesmus (Acutodesmus) obliquus KGE-17 cultivation
Authors
송경근최욱진최아나박준홍이병찬
Keywords
Microalgae; Heterotrophic; Mixotrophic; Photoautotrophic; Scenedesmus obliquus
Issue Date
2019-07
Publisher
Bioprocess and biosystems engineering
Citation
VOL 42, NO 7-1234
Abstract
This study compared the performance of microalga growth, nutrient removal, algal organic matter, and energy storage products in mixotrophic, photoautotrophic, and heterotrophic conditions. Scenedesmus obliquus was used as a model species. Mixotrophic condition showed the highest specific growth rate of 0.96 d− 1 as well as the fastest nitrogen and phosphorus removal rate of 85.17 mg-N g-cell− 1 day− 1 and 11.49 mg-P g-cell− 1, respectively, compared with photoautotrophic and heterotrophic conditions. Mixotrophic microalgae had relatively higher carbohydrates and lipids contents (21.8 and 24.0%) than photoautotrophic and heterotrophic conditions. Meanwhile, algal organic matter (AOM) in the medium was produced at the highest level under photoautotrophic condition. Mixotrophic condition was more efficient in terms of microalga growth, nutrient removal, production of energy storage products, and suppression of AOM, and would be adaptable for wastewater treatment process.
URI
http://pubs.kist.re.kr/handle/201004/69589
ISSN
1615-7591
Appears in Collections:
KIST Publication > Article
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